METHOD FOR PREPARING OF ZNS-ZNO PHOTOCATALYST ACTIVATED IN THE VISIBLE LIGHT

摘要

A method for preparing a ZnS-ZnO photocatalyst which can substantially improve the visible light absorbance of a reactant, can efficiently remove contaminants under visible lights, and can be applied to hydrogen production, air purification, etc. under visible lights, and the ZnS-ZnO photocatalyst prepared by the method are provided. A method for preparing a ZnS-ZnO photocatalyst responding to visible lights comprises the step of filtering, drying and firing the coprecipitated ZnS-ZnO after coprecipitating ZnS and ZnO by adding a zinc precursor solution into a mixed solution of a sulfur-containing metal salt solution and a hydroxyl group-containing hydroxide salt solution. A ZnS-ZnO photocatalyst responding to visible lights is in the form of a powder having a crystalline structure in which structures of cubic zincblende and hexagonal wurtzite are present at the same time, having a particle size of 15 to 25 nm, and containing Zn, S and O as principal elements.